The Taiyo class escort carrier Unyo was converted from the liner Yawata Maru and joined the Combined Fleet in May 1942. The Unyo was mostly used to transport planes to Truk and the Japanese outer bases. In November 1943 the Unto was operating with a Japanese task force that was attacked by the submarine USS Sailfish. In January 1944 the Unyo was attacked by the submarine USS Haddock. She was struck by 3 torpedoes and limped into Saipan for emergency repairs. After repairs in home waters the Unyo began working as a convoy escort. After departing Seletar in September 1944 with convoy HI-74 the Unyo was torpedoed by the submarine USS Barb. The Unyo was hit twice in the starboard side. She sunk about 5 hours later. The Unyo displaced 20,00 tons, had a speed of 21 knots and could carry up to 27 airplanes. This model shows the Unyo painted in standard Japanese late war carrier camouflage around mid 1944.

The IJN Tako class Heavy Cruiser Maya was finished at the Kawasaki shipyard and commissioned on June 30, 1932. She was originally armed with 10 x 203 mm 50-cal (8 in.), 8 x 127 mm (5 in.) 40-cal duel purpose, 8 x 25 mm AA, 4 x 13.2 mm AA, 4 x 4 610 mm torpedo tubes, one Aichi E13A1 Jake and two F1M2 Pete seaplanes. When WWII broke out the Maya participated in the invasion of the Philippines. After the invasion she performed convoy escort and anti submarine patrols. In February 1942 she participated raid on Port Darwin, Australia after which she performed anti shipping patrols sinking several ships. After overhaul, she provide gunfire support for the invasion of the Aleutian Islands. In October and again in November 1942 the Maya bombards Henderson Field, Guadalcanal. On March 26, 1943 she fights in the Battle of the Komandorski Islands where she is lightly damaged. On November 5, 1943 the Maya is attacked a SBD dive bomber from USS Saratoga and is hit by a bomb in the aircraft deck which starts a major fire in the engine room. After undergoing emergency repairs at Rabaul she departs for Japan for a major overhaul where she undergoes major repairs and modification to an AA cruiser. Her No. 3 8 inch turret is removed as well as the twin mount 25 mm AA guns, 4.7 inch guns, twin torpedo tube mounts and the seaplane hangar. Thirteen Type 96 triple mount 25 mm AA guns, six twin 127 mm HA, nine Type 96 single mount 25 mm AA guns and 36 Type 93 13 mm Machineguns are installed along with 4 type 92 quadruple torpedo mounts and a Type 22 surface search radar. After her conversion the Maya fights in the Battle of the Philippine Sea and is lightly damaged. After repairs she fights in the Battle of Leyte Gulf on October 22, 1944. At 0555 on October 23, 1944 the Maya is hit by 4 torpedoes fired by the submarine USS Dace SS-247. At 0605, Maya sinks taking 470 crew with her.

The Imperial Japanese Navy Matsu (Pine) class destroyers were late war expedients designed and armed more like destroyer escorts and used mainly for convoy protection. The Matsu was armed with 3 x 5"/40 DP guns, 9 x 25 mm AA guns, 4 x 24" Torpedo Tubes and 36 depth charges. Designed for mass production a Matsu class destroyer could be built in about six months as opposed to over a year for the larger destroyers. 18 Matsu class destroyers were built. The Matsu was sunk on August 4, 1944 by aircraft from the TG 58.1 and gunfire from the destroyers USS Cogswell, USS Ingersoll and USS Knapp.

The I-58 was an IJN Type-B Mod.2 (Type B3) I-54 class cruiser submarine. She was laid down on December 26, 1942, launched on October 9, 1943 and entered service on September 7, 1944. Designed as a long range cruiser submarine, she was modified during construction to carry Kaiten manned suicide torpedoes. The I-58 was participated in several attacked on US ships and damaged two destroyers with Kaiten attacks. Her most famous attack was against the heavy cruiser USS Indianapolis (CA-35). On July 29, 1945 Indianapolis was on her way home after delivering parts for the Hiroshima and Nagasaki bombs. I-58 detected Indianapolis and submerged and prepared to attack with Type 95 torpedoes. After maneuvering into position the submarine fired a spread of six torpedoes at 2-second intervals. She got 3 hits on Indianapolis and she sunk in less than an hour. The submarine surrendered in September 1945, and was scuttled by the United States Navy on April 1, 1946 near the Goto Islands I-58 was armed with 6 533 mm (21 in.) torpedo tubes, 19 Type 95 torpedoes, 1 140 mm (5.5 in.) L/40 11th Year Type Naval gun and 2 Type 96 25mm AA guns. Before her modification she also had a catapult and hangar for a Yokosuka E14Y2 Glen floatplane.

The Imperial Japanese Navy Type C1 submarine was designed to carry a midget submarine aft. Their eight torpedo tubes were all forward and were served via two separate torpedo rooms, one above the other. Along with the other C1 submarines, the I-16 carried a midget submarine that was deployed to assist the attack on Pearl Harbor. All of the midgets were lost, and only one actually entered the harbor. On 30 May 1942, I-16 and I-20 launched midgets outside the British naval base at Diego Suarez, Madagascar. The I-16 also launched a midget off Guadalcanal on November 7, 1942. The I-16 was sunk by the USS England northeast of the Solomons on May 19, 1944.